20190914171100.0 0096-9508 0096-9508 Bulletin - State of Maryland, Board of Natural Resources, Department of Geology, Mines and Water Resources 0096-9508 Bulletin - State of Maryland, Board of Natural Resources, Department of Geology, Mines and Water Resources. Bulletin - State of Maryland, Board of Natural Resources, Department of Geology, Mines and Water Resources 0096-9508 Maryland 0096-9508 Bulletin - State of Maryland, Board of Natural Resources, Department of Geology, Mines and Water Resources.